Mayweather, McGregor wrap up profane PR tour in London

LONDON (Reuters) - Floyd Mayweather and Conor McGregor wrapped up the four-day promotional tour for their boxing match in Las Vegas in August with another foul-mouthed press conference, this time in front of thousands of fans at the Wembley Arena in London.

The undefeated American Mayweather and the UFC lightweight champ McGregor of Ireland traded many of the same crude jibes used at previous events in Los Angeles, Toronto and New York. After a four-day war of words, the focus now switches to the fight itself.

Celebrating his 29th birthday and wearing another sharp suit, McGregor once again spoke first, and he wasted no time firing insults at Mayweather and his team as he strutted around the three-sided boxing ring set up for the event.

"Let's get it straight. The bullshit is now over. In six weeks I'm gonna sleep this fool, and when I sleep him, I'm going to bounce his head off the canvas as well," a jubilant McGregor told a noisy, partisan crowd mostly made up of his fans.

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NEW YORK, NY - NOVEMBER 12: Conor McGregor of Ireland celebrates his victory over Eddie Alvarez in their UFC lightweight championship fight during the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Brandon Magnus/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 09: UFC Featherweight Champion Conor McGregor takes part in UFC 205 Open Workouts at Madison Square Garden on November 9, 2016 in New York City. (Photo by Michael Reaves/Getty Images)

LAS VEGAS, NV - AUGUST 20: Conor McGregor (L) hits Nate Diaz with a left during their welterweight rematch at the UFC 202 event at T-Mobile Arena on August 20, 2016 in Las Vegas, Nevada. (Photo by Steve Marcus/Getty Images)

New York , United States - 17 March 2017; UFC Lightweight Champion Conor McGregor during an interview in The Theater in Madison Square Garden in New York, USA. (Photo By Ramsey Cardy/Sportsfile via Getty Images)

NEW YORK, NY - NOVEMBER 12: UFC featherweight and lightweight champion Conor McGregor of Ireland poses for a picture during the UFC 205 post fight press conference at Madison Square Garden on November 12, 2016 in New York City. (Photo by Brandon Magnus/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 12: Conor McGregor of Ireland celebrates his KO victory over Eddie Alvarez of the United States in their lightweight championship bout during the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 12: Conor McGregor of Ireland warms up in his locker room prior to his lightweight title fight against Eddie Alvarez during the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Ed Mulholland/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 12: Eddie Alvarez of the United States (right) fights against Conor McGregor of Ireland in their lightweight championship bout during the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 12: Conor McGregor of Ireland warms up in his locker room prior to his lightweight title fight against Eddie Alvarez during the UFC 205 event at Madison Square Garden on November 12, 2016 in New York City. (Photo by Ed Mulholland/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 11: (R-L) Conor McGregor of Ireland and Eddie Alvarez face off during the UFC 205 weigh-in inside Madison Square Garden on November 11, 2016 in New York City. (Photo by Brandon Magnus/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - NOVEMBER 11: UFC Featherweight Champion Conor McGregor reacts during UFC 205 Weigh-ins at Madison Square Garden on November 11, 2016 in New York City. (Photo by Michael Reaves/Getty Images)

NEW YORK, NY - NOVEMBER 10: UFC featherweight champion Conor McGregor of Ireland interacts with fans and media during the UFC 205 press conference inside The Theater at Madison Square Garden on November 10, 2016 in New York City. (Photo by Mike Roach/Zuffa LLC/Zuffa LLC via Getty Images)

NEW YORK, NY - SEPTEMBER 27: UFC featherweight champion Conor McGregor of Ireland interacts with the media and fans during the UFC 205 press event at Madison Square Garden on September 27, 2016 in New York City. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

LAS VEGAS, NV - AUGUST 20: Conor McGregor waits for the start of his welterweight rematch against Nate Diaz at the UFC 202 event at T-Mobile Arena on August 20, 2016 in Las Vegas, Nevada. McGregor won by majority decision. (Photo by Steve Marcus/Getty Images)

LAS VEGAS, NV - AUGUST 25: Boxer Floyd Mayweather Jr. (L) and UFC lightweight champion Conor McGregor face off during their official weigh-in at T-Mobile Arena on August 25, 2017 in Las Vegas, Nevada. The two will meet in a super welterweight boxing match at T-Mobile Arena on August 26. (Photo by Ethan Miller/Getty Images)

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When Mayweather got on the mic he was booed relentlessly, the crowd chanting abuse and taunting the 40-year-old over his unpaid taxes, but he appeared unfazed.

"I'm the teacher. August 26th, I'm gonna take you to school," Mayweather roared before taunting McGregor about his submission loss to Nate Diaz in 2016.

After both sides added to the pile of homophobic, racial and misogynistic slurs aired all week with another round of profanities, the two finally squared off before taking a handful of questions from media members that eased the tension somewhat.

Undefeated WBC/WBA welterweight champion Floyd Mayweather Jr. speaks during a news conference at MGM Grand Hotel & Casino in Las Vegas September 9, 2015. Mayweather will defend his titles against challenger Andre Berto at the MGM Grand Garden Arena on Sept. 12 in what he says will be his final fight. REUTERS/Las VegasSun/Steve Marcus

Floyd Mayweather, Jr. of the U.S. celebrates after defeating Manny Pacquiao of the Philippines in their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada, May 2, 2015. REUTERS/Steve Marcus

Promoter and former champion boxer Floyd Mayweather (C) speaks during a press conference announcing WBA super lightweight champion Adrien Broner's fight against Ashley Theophane, in Washington, DC, February 29, 2016.
The title contest is scheduled to take place April 1, 2016 at the D.C. Armory in Washington DC. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

LOS ANGELES, CA - JULY 16: Professional boxer Floyd Mayweather Jr. arrives at the 2014 ESPY Awards at Nokia Theatre L.A. Live on July 16, 2014 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)

World Boxing Council (WBC) welterweight champion Floyd Mayweather Jr. of the U.S. works on his abdominal muscles at the Mayweather Boxing Club in Las Vegas, Nevada April 22, 2014. Mayweather is preparing for his fight against World Boxing Association (WBA) champion Marcos Maidana of Argentina at the MGM Grand Garden Arena in Las Vegas on May 3. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING)

World Boxing Council (WBC) welterweight champion Floyd Mayweather Jr. (L) of the U.S. works on his timing with his uncle and trainer Roger Mayweather at the Mayweather Boxing Club in Las Vegas, Nevada April 22, 2014. Mayweather is preparing for his fight against World Boxing Association (WBA) champion Marcos Maidana of Argentina at the MGM Grand Garden Arena in Las Vegas on May 3. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING)

Manny Pacquiao of the Philippines (R) and Floyd Mayweather, Jr. of the U.S. fight in the seventh round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada, May 2, 2015. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. celebrates defeating Manny Pacquiao of the Philippines in a unanimous decision following their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada, May 2, 2015. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. lands a left to the face of Manny Pacquiao of the Philippines (R) in the 11th round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada, May 2, 2015. REUTERS/Steve Marcus

Undefeated WBC/WBA welterweight champion Floyd Mayweather Jr. (L) of the U.S. and WBO welterweight champion Manny Pacquiao of the Philippines face off during an official weigh-in at the MGM Grand Garden Arena in Las Vegas, Nevada May 1, 2015. The boxers will fight in a welterweight unification bout at the arena on May 2. REUTERS/Steve Marcus

World Boxing Council (WBC) welterweight champion Floyd Mayweather Jr. of the U.S. is seen during a media workout at the Mayweather Boxing Club in Las Vegas, Nevada April 22, 2014. Mayweather is preparing for his fight against World Boxing Association (WBA) champion Marcos Maidana of Argentina at the MGM Grand Garden Arena in Las Vegas on May 3. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING)

WBC/WBA welterweight champion Floyd Mayweather Jr. (L) of the U.S. reaches for a punch on Marcos Maidana of Argentina during their title fight at the MGM Grand Garden Arena in Las Vegas, Nevada September 13, 2014. REUTERS/Steve Marcus (UNITED STATES - Tags: SPORT BOXING)

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Both fighters now return to their respective training camps to prepare for the fight itself, which takes place at the T-Mobile Arena in Las Vegas on August 26.